當鋼波紋管涵(han)處(chu)于(yu)軟土(tu)(tu)地(di)基上時(shi),需對軟土(tu)(tu)路基進行處(chu)理(li),然后,在其(qi)上填一層大于(yu)20cm厚的(de)砂(sha)礫墊層,并夯(hang)(hang)實(shi)嚴密(mi)。承載(zai)才(cai)干不太高的(de)普通地(di)基,需設厚度的(de)基礎。但是(shi),若(ruo)將(jiang)涵(han)管底基槽(cao)原(yuan)狀土(tu)(tu)經嚴厲夯(hang)(hang)實(shi)(其(qi)夯(hang)(hang)實(shi)度到重型擊實(shi)密(mi)實(shi)度的(de)90%以上)往(wang)后,也可直接將(jiang)鋼(gang)制波紋管涵(han)置于(yu)地(di)基上。
When the steel corrugated pipe culvert is on the soft soil foundation, the soft soil subgrade shall be treated, and then a layer of gravel cushion with thickness of 20cm shall be filled on it and compacted tightly. For ordinary foundation with low bearing ability, it is necessary to set a foundation with thickness. However, if the undisturbed soil of culvert bottom foundation trench is severely compacted (its compaction degree is more than 90% of heavy compaction density), steel corrugated pipe culvert can also be directly placed on the foundation.
雙壁波(bo)紋管(guan)的水平鋪裝,銜(xian)接管(guan)道滑管(guan)和排(pai)氣閥門,排(pai)氣閥門比室外(wai)高20-50公(gong)分。結構(gou)簡單,修建(jian)施工方便快捷。鋼波(bo)紋管(guan)涵(han)不能(neng)直接置(zhi)于(yu)巖石或混凝土(tu)基床(chuang)上,因過于(yu)剛(gang)性(xing)的支承(cheng),不光會下降管(guan)壁本(ben)身(shen)所具有(you)的柔性(xing),并且還會減小(xiao)涵(han)管(guan)的承(cheng)載才干。
所以對巖石地基應挖掉一部分軟巖,換填一層土,并仔細夯實。出產制作特點好,安裝允許有轉角。按雙壁波紋管規范基坑(keng)矩形坑(keng),墊(dian)層選用50mm混凝土(tu)。鋼(gang)波紋管(guan)等工藝也在不斷地前進與(yu)開(kai)展,逐(zhu)漸開(kai)展出直口(kou)、剛度流水(shui)線(xian)、承插孔和軟(ruan)性流水(shui)線(xian)的這(zhe)幾種接口(kou)行事。
因為直口管和剛度流(liu)水線(xian)管工程施工效率低(di),抗震等級(ji)特性差,路基(ji)(ji)移動(dong)會使插口翻開,形成地上陷落危害。因而這(zhe)二(er)種(zhong)插口在工程項目中已基(ji)(ji)礎不選(xuan)用。電纜(lan)載流(liu)量高,鋪(pu)裝(zhuang)指(zhi)數(shu)(shu)值高過PVC管材10個百分數(shu)(shu)。
雙壁波紋管的安裝應與左右垂直面,外側高,視點低(視點5o),以確保洗后沒有水。管道后端工程師與墻正中間的距離應在20-25厘米正中間。寒冷地區應在管道外蓋上補水保濕層,先用細砂夯實,再用2cm抹灰砂漿整平。分析化學特點安穩、不焦化、其抗拉強度隨時問提高而有所增加。//hanihanbj.com/
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